/***************************************************************************
 * Copyright 2012-2013 TXT e-solutions SpA
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This work was performed within the IoT_at_Work Project
 * and partially funded by the European Commission's
 * 7th Framework Programme under the contract ICT-257367.
 *
 * Authors:
 *      Salvatore Piccione (TXT e-solutions SpA)
 *
 * Contributors:
 *        Domenico Rotondi (TXT e-solutions SpA)
 **************************************************************************/
package it.txt.ens.namespace.osgi;

import it.txt.ens.namespace.NamespaceInquirerFactory;

import java.util.ArrayList;
import java.util.Dictionary;
import java.util.Hashtable;
import java.util.List;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.cm.ManagedServiceFactory;

/**
 * @author Salvatore Piccione (TXT e-solutions SpA - salvatore.piccione AT txtgroup.com)
 * @author Domenico Rotondi (TXT e-solutions SpA - domenico.rotondi AT txtgroup.com)
 *
 */
public class Activator implements BundleActivator {

    private static final int REGISTERED_SERVICES_COUNT = 2;
    //    private static ClassLoader contextClassLoader;
    private List<ServiceRegistration<?>> registrations;
    private static volatile boolean RUNNING_ON_OSGI = false;
    
    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    @Override
    public void start(BundleContext context) throws Exception {
        RUNNING_ON_OSGI = true;
        
        registrations = new ArrayList<ServiceRegistration<?>>(REGISTERED_SERVICES_COUNT);
//        Thread.currentThread().setContextClassLoader(Activator.class.getClassLoader());
        //setContextClassLoader(Activator.class.getClassLoader());
        Dictionary<String,Object> properties = new Hashtable<String, Object>();
        properties.put(Constants.SERVICE_PID, NamespaceInquirerMSF.PID);
        
        
        registrations.add(context.registerService(
                ManagedServiceFactory.class, new NamespaceInquirerMSF(context), properties));
        registrations.add(context.registerService(NamespaceInquirerFactory.class.getName(), 
                new NamespaceInquirerFactorySF(), null));
    }

    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
     */
    @Override
    public void stop(BundleContext context) throws Exception {
        for (ServiceRegistration<?> registration: registrations)
            registration.unregister();
    }
    
    public static boolean isRunningOnOSGi () {
        return RUNNING_ON_OSGI;
    }
//
//
//    public static ClassLoader getContextClassLoader() {
//        return contextClassLoader;
//    }
//
//    public static void setContextClassLoader(ClassLoader contextClassLoader) {
//        Activator.contextClassLoader = contextClassLoader;
//    }
}
